Numbers k such that cyclotomic(k, prime(k)) is a prime number.

Terms

a(0) =3a(1) =6a(2) =7a(3) =14a(4) =19a(5) =31a(6) =34a(7) =66a(8) =93a(9) =307a(10) =402a(11) =421a(12) =600a(13) =848a(14) =1022a(15) =1057a(16) =1906a(17) =3772a(18) =4184a(19) =4364